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nmi_create_files() in arch/i386/oprofile/nmi_int.c depends on model->num_counters (number of performance counters) being less than 10. While this is currently the case, it's too clever by half. Other archs aren't quite as clever: they assume 100. I suggest to normalize them all to 1000. Cc: Philippe Elie <phil.el@wanadoo.fr> Cc: John Levon <levon@movementarian.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
190 lines
4.4 KiB
C
190 lines
4.4 KiB
C
/**
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* @file arch/alpha/oprofile/common.c
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*
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* @remark Copyright 2002 OProfile authors
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* @remark Read the file COPYING
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*
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* @author Richard Henderson <rth@twiddle.net>
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*/
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#include <linux/oprofile.h>
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#include <linux/init.h>
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#include <linux/smp.h>
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#include <linux/errno.h>
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#include <asm/ptrace.h>
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#include <asm/system.h>
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#include "op_impl.h"
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extern struct op_axp_model op_model_ev4 __attribute__((weak));
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extern struct op_axp_model op_model_ev5 __attribute__((weak));
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extern struct op_axp_model op_model_pca56 __attribute__((weak));
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extern struct op_axp_model op_model_ev6 __attribute__((weak));
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extern struct op_axp_model op_model_ev67 __attribute__((weak));
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static struct op_axp_model *model;
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extern void (*perf_irq)(unsigned long, struct pt_regs *);
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static void (*save_perf_irq)(unsigned long, struct pt_regs *);
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static struct op_counter_config ctr[20];
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static struct op_system_config sys;
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static struct op_register_config reg;
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/* Called from do_entInt to handle the performance monitor interrupt. */
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static void
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op_handle_interrupt(unsigned long which, struct pt_regs *regs)
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{
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model->handle_interrupt(which, regs, ctr);
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/* If the user has selected an interrupt frequency that is
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not exactly the width of the counter, write a new value
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into the counter such that it'll overflow after N more
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events. */
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if ((reg.need_reset >> which) & 1)
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model->reset_ctr(®, which);
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}
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static int
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op_axp_setup(void)
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{
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unsigned long i, e;
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/* Install our interrupt handler into the existing hook. */
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save_perf_irq = perf_irq;
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perf_irq = op_handle_interrupt;
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/* Compute the mask of enabled counters. */
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for (i = e = 0; i < model->num_counters; ++i)
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if (ctr[i].enabled)
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e |= 1 << i;
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reg.enable = e;
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/* Pre-compute the values to stuff in the hardware registers. */
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model->reg_setup(®, ctr, &sys);
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/* Configure the registers on all cpus. */
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(void)smp_call_function(model->cpu_setup, ®, 0, 1);
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model->cpu_setup(®);
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return 0;
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}
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static void
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op_axp_shutdown(void)
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{
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/* Remove our interrupt handler. We may be removing this module. */
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perf_irq = save_perf_irq;
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}
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static void
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op_axp_cpu_start(void *dummy)
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{
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wrperfmon(1, reg.enable);
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}
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static int
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op_axp_start(void)
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{
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(void)smp_call_function(op_axp_cpu_start, NULL, 0, 1);
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op_axp_cpu_start(NULL);
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return 0;
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}
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static inline void
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op_axp_cpu_stop(void *dummy)
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{
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/* Disable performance monitoring for all counters. */
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wrperfmon(0, -1);
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}
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static void
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op_axp_stop(void)
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{
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(void)smp_call_function(op_axp_cpu_stop, NULL, 0, 1);
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op_axp_cpu_stop(NULL);
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}
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static int
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op_axp_create_files(struct super_block * sb, struct dentry * root)
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{
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int i;
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for (i = 0; i < model->num_counters; ++i) {
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struct dentry *dir;
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char buf[4];
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snprintf(buf, sizeof buf, "%d", i);
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dir = oprofilefs_mkdir(sb, root, buf);
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oprofilefs_create_ulong(sb, dir, "enabled", &ctr[i].enabled);
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oprofilefs_create_ulong(sb, dir, "event", &ctr[i].event);
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oprofilefs_create_ulong(sb, dir, "count", &ctr[i].count);
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/* Dummies. */
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oprofilefs_create_ulong(sb, dir, "kernel", &ctr[i].kernel);
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oprofilefs_create_ulong(sb, dir, "user", &ctr[i].user);
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oprofilefs_create_ulong(sb, dir, "unit_mask", &ctr[i].unit_mask);
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}
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if (model->can_set_proc_mode) {
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oprofilefs_create_ulong(sb, root, "enable_pal",
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&sys.enable_pal);
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oprofilefs_create_ulong(sb, root, "enable_kernel",
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&sys.enable_kernel);
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oprofilefs_create_ulong(sb, root, "enable_user",
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&sys.enable_user);
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}
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return 0;
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}
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int __init
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oprofile_arch_init(struct oprofile_operations *ops)
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{
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struct op_axp_model *lmodel = NULL;
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switch (implver()) {
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case IMPLVER_EV4:
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lmodel = &op_model_ev4;
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break;
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case IMPLVER_EV5:
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/* 21164PC has a slightly different set of events.
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Recognize the chip by the presence of the MAX insns. */
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if (!amask(AMASK_MAX))
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lmodel = &op_model_pca56;
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else
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lmodel = &op_model_ev5;
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break;
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case IMPLVER_EV6:
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/* 21264A supports ProfileMe.
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Recognize the chip by the presence of the CIX insns. */
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if (!amask(AMASK_CIX))
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lmodel = &op_model_ev67;
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else
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lmodel = &op_model_ev6;
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break;
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}
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if (!lmodel)
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return -ENODEV;
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model = lmodel;
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ops->create_files = op_axp_create_files;
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ops->setup = op_axp_setup;
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ops->shutdown = op_axp_shutdown;
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ops->start = op_axp_start;
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ops->stop = op_axp_stop;
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ops->cpu_type = lmodel->cpu_type;
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printk(KERN_INFO "oprofile: using %s performance monitoring.\n",
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lmodel->cpu_type);
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return 0;
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}
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void
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oprofile_arch_exit(void)
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{
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}
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